Hi, I do not trust dry dog food, beacuse of huge amount of corn ingredient in it. I think that from the evolution point of view stomachs of our babies - I mean dogs ;-) are not adjusted to digesting it and dog food industry uses it as it is cheap and easy to make, below I give a link to an article about this.
I think it is just as with human food industry, we should really more on what we prepare ourselves!
The Truth About Corn in Dog Food Everything about Yorkies - Yorkshire Terriers Naturally: meat vs. dry dog food of popular producer